Unit 1 Review 2

Chemistry Terms

100

This is made up of two or more elements in a fixed proportion. 

What is a compound. 

200

This is the branch of chemistry that studies the mechanism, rate, and energy transfer in chemical reactions. 

What is analytical chemistry

300

This is a type of change that does not alter a substance's chemical composition. 

What is a physical change. 

400

This is the ratio of the distance moved of a solute by a solvent. 

What is a Rf value. 

500

This is the phase in chromatography that moves up the filter paper. 

What is the mobile phase. 

Dimensional Analysis

100

This is the first step in using dimensional analysis. 

What is determine what you are looking for. 

200

These are equivalent values used to change units in dimensional analysis. 

What is conversion factor. 

300

Convert 36 seconds to hours. 

What is .01 hours. 

400

Convert 400. miles to inches. (Remember sig figs) 

(1 mi = 1609 m) 

(1 m = 39.4 in) 

What is 25,400,000 inches or 2.54 x 10⁷

500

There are 200. people at a party and each person eats .25 cup of chili. This amount of tsp will be eaten. (Must show work & sig figs) 

(1.0 cup = 48 tsp) 

What is 2,400 tsp. 

Sig Figs

100

This is the amount of sig figs in this number: 

0.00337902270

What is 9. 

200

This is the reason zeros are not significant in this value: 

0.00048 

What is the zeros are at the beginning of a number. 

300

Answer the following according to sig figs:

(4.89 - 3.2) x 7.22 =

What is 12. 

400

These are the types/type of measurements that require sig figs. 

What is all measurements done in chemistry. 

500

7.90 x 10 ⁴⁶ contains this many sig figs. 

What is three. 

Density Problems

100

Calculate the mass of an object with a density of 2.78 g/ml and a volume of 48ml. 

What is 130 grams. 

200

Find the volume in mL of 8.91 grams of water. 

What is 8.91 mL. 

300

Find the density of oobleck if its mass is 6.54 g and its volume is 86 cm³

What is .076 g/cm³

400

These are the two units of density. 

What is g/mL and g/cm³

500

Draw a particle diagram that represents a bubble that floats over dry ice. 

Up to teacher's discretion. 

Random

100

Draw particle diagrams for the three states of matter. 

Up to teacher's discretion. 

200

Explain whether or not a single measurement can be precise. 

What is it cannot, because precision is a comparison value. 

300

List three indications of a chemical reaction from the reaction in a bag. 

What is color change, temperature change, and gas produced. 

400

Before starting a lab, you must do this. (From safety contract) 

What is read procedures thoroughly. 

500

This was a chemistry career given from the textbook. 

What is a biomedicine career, firefighter, or environmentalist.